// SoftEther VPN Source Code
// Cedar Communication Module
// 
// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
// 
// Copyright (c) Daiyuu Nobori, Ph.D..
// Copyright (c) SoftEther VPN Project, University of Tsukuba, Japan.
// Copyright (c) SoftEther Corporation.
// 
// All Rights Reserved.
// 
// http://www.softether.org/
// 
// Author: Daiyuu Nobori
// Comments: Tetsuo Sugiyama, Ph.D.
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// version 2 as published by the Free Software Foundation.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License version 2
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// 
// THE LICENSE AGREEMENT IS ATTACHED ON THE SOURCE-CODE PACKAGE
// AS "LICENSE.TXT" FILE. READ THE TEXT FILE IN ADVANCE TO USE THE SOFTWARE.
// 
// 
// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN,
// UNDER JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY,
// MERGE, PUBLISH, DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS
// SOFTWARE, THAT ANY JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS
// SOFTWARE OR ITS CONTENTS, AGAINST US (SOFTETHER PROJECT, SOFTETHER
// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
// DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND OF USING, COPYING,
// MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING, AND/OR
// SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO
// EXCLUSIVE JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO,
// JAPAN. YOU MUST WAIVE ALL DEFENSES OF LACK OF PERSONAL JURISDICTION
// AND FORUM NON CONVENIENS. PROCESS MAY BE SERVED ON EITHER PARTY IN
// THE MANNER AUTHORIZED BY APPLICABLE LAW OR COURT RULE.
// 
// USE ONLY IN JAPAN. DO NOT USE THIS SOFTWARE IN ANOTHER COUNTRY UNLESS
// YOU HAVE A CONFIRMATION THAT THIS SOFTWARE DOES NOT VIOLATE ANY
// CRIMINAL LAWS OR CIVIL RIGHTS IN THAT PARTICULAR COUNTRY. USING THIS
// SOFTWARE IN OTHER COUNTRIES IS COMPLETELY AT YOUR OWN RISK. THE
// SOFTETHER VPN PROJECT HAS DEVELOPED AND DISTRIBUTED THIS SOFTWARE TO
// COMPLY ONLY WITH THE JAPANESE LAWS AND EXISTING CIVIL RIGHTS INCLUDING
// PATENTS WHICH ARE SUBJECTS APPLY IN JAPAN. OTHER COUNTRIES' LAWS OR
// CIVIL RIGHTS ARE NONE OF OUR CONCERNS NOR RESPONSIBILITIES. WE HAVE
// NEVER INVESTIGATED ANY CRIMINAL REGULATIONS, CIVIL LAWS OR
// INTELLECTUAL PROPERTY RIGHTS INCLUDING PATENTS IN ANY OF OTHER 200+
// COUNTRIES AND TERRITORIES. BY NATURE, THERE ARE 200+ REGIONS IN THE
// WORLD, WITH DIFFERENT LAWS. IT IS IMPOSSIBLE TO VERIFY EVERY
// COUNTRIES' LAWS, REGULATIONS AND CIVIL RIGHTS TO MAKE THE SOFTWARE
// COMPLY WITH ALL COUNTRIES' LAWS BY THE PROJECT. EVEN IF YOU WILL BE
// SUED BY A PRIVATE ENTITY OR BE DAMAGED BY A PUBLIC SERVANT IN YOUR
// COUNTRY, THE DEVELOPERS OF THIS SOFTWARE WILL NEVER BE LIABLE TO
// RECOVER OR COMPENSATE SUCH DAMAGES, CRIMINAL OR CIVIL
// RESPONSIBILITIES. NOTE THAT THIS LINE IS NOT LICENSE RESTRICTION BUT
// JUST A STATEMENT FOR WARNING AND DISCLAIMER.
// 
// 
// SOURCE CODE CONTRIBUTION
// ------------------------
// 
// Your contribution to SoftEther VPN Project is much appreciated.
// Please send patches to us through GitHub.
// Read the SoftEther VPN Patch Acceptance Policy in advance:
// http://www.softether.org/5-download/src/9.patch
// 
// 
// DEAR SECURITY EXPERTS
// ---------------------
// 
// If you find a bug or a security vulnerability please kindly inform us
// about the problem immediately so that we can fix the security problem
// to protect a lot of users around the world as soon as possible.
// 
// Our e-mail address for security reports is:
// softether-vpn-security [at] softether.org
// 
// Please note that the above e-mail address is not a technical support
// inquiry address. If you need technical assistance, please visit
// http://www.softether.org/ and ask your question on the users forum.
// 
// Thank you for your cooperation.
// 
// 
// NO MEMORY OR RESOURCE LEAKS
// ---------------------------
// 
// The memory-leaks and resource-leaks verification under the stress
// test has been passed before release this source code.


// Database.c
// License database

#include "CedarPch.h"

// Get the License status string
wchar_t *LiGetLicenseStatusStr(UINT i)
{
	wchar_t *ret = _UU("LICENSE_STATUS_OTHERERROR");

	switch (i)
	{
	case LICENSE_STATUS_OK:
		ret = _UU("LICENSE_STATUS_OK");
		break;

	case LICENSE_STATUS_EXPIRED:
		ret = _UU("LICENSE_STATUS_EXPIRED");
		break;

	case LICENSE_STATUS_ID_DIFF:
		ret = _UU("LICENSE_STATUS_ID_DIFF");
		break;

	case LICENSE_STATUS_DUP:
		ret = _UU("LICENSE_STATUS_DUP");
		break;

	case LICENSE_STATUS_INSUFFICIENT:
		ret = _UU("LICENSE_STATUS_INSUFFICIENT");
		break;

	case LICENSE_STATUS_COMPETITION:
		ret = _UU("LICENSE_STATUS_COMPETITION");
		break;

	case LICENSE_STATUS_NONSENSE:
		ret = _UU("LICENSE_STATUS_NONSENSE");
		break;

	case LICENSE_STATUS_CPU:
		ret = _UU("LICENSE_STATUS_CPU");
		break;
	}

	return ret;
}

static char *li_keybit_chars = "ABCDEFGHJKLMNPQRSTUVWXYZ12345678";

// Convert the string to a key bit
bool LiStrToKeyBit(UCHAR *keybit, char *keystr)
{
	UINT x[36];
	UINT i, wp;
	char *str;
	// Validate arguments
	if (keybit == NULL || keystr == NULL)
	{
		return false;
	}

	str = CopyStr(keystr);
	Trim(str);

	wp = 0;
	if (StrLen(str) != 41)
	{
		Free(str);
		return false;
	}

	for (i = 0;i < 36;i++)
	{
		char c = str[wp++];
		UINT j;

		if (((i % 6) == 5) && (i != 35))
		{
			if (str[wp++] != '-')
			{
				Free(str);
				return false;
			}
		}

		x[i] = INFINITE;
		for (j = 0;j < 32;j++)
		{
			if (ToUpper(c) == li_keybit_chars[j])
			{
				x[i] = j;
			}
		}

		if (x[i] == INFINITE)
		{
			Free(str);
			return false;
		}
	}

	Zero(keybit, 23);

	keybit[0] = x[0] << 1 | x[1] >> 4;
	keybit[1] = x[1] << 4 | x[2] >> 1;
	keybit[2] = x[2] << 7 | x[3] << 2 | x[4] >> 3;
	keybit[3] = x[4] << 5 | x[5];

	keybit[4] = x[6] << 3 | x[7] >> 2;
	keybit[5] = x[7] << 6 | x[8] << 1 | x[9] >> 4;
	keybit[6] = x[9] << 4 | x[10] >> 1;
	keybit[7] = x[10] << 7 | x[11] << 2 | x[12] >> 3;
	keybit[8] = x[12] << 5 | x[13];

	keybit[9] = x[14] << 3 | x[15] >> 2;
	keybit[10] = x[15] << 6 | x[16] << 1 | x[17] >> 4;
	keybit[11] = x[17] << 4 | x[18] >> 1;
	keybit[12] = x[18] << 7 | x[19] << 2 | x[20] >> 3;
	keybit[13] = x[20] << 5 | x[21];

	keybit[14] = x[22] << 3 | x[23] >> 2;
	keybit[15] = x[23] << 6 | x[24] << 1 | x[25] >> 4;
	keybit[16] = x[25] << 4 | x[26] >> 1;
	keybit[17] = x[26] << 7 | x[27] << 2 | x[28] >> 3;
	keybit[18] = x[28] << 5 | x[29];

	keybit[19] = x[30] << 3 | x[31] >> 2;
	keybit[20] = x[31] << 6 | x[32] << 1 | x[33] >> 4;
	keybit[21] = x[33] << 4 | x[34] >> 1;
	keybit[22] = x[34] << 7 | x[35] << 2;

	Free(str);

	return true;
}

// Determine whether the string is a license key
bool LiIsLicenseKey(char *str)
{
	UCHAR keybit[23];
	// Validate arguments
	if (str == NULL)
	{
		return false;
	}

	if (LiStrToKeyBit(keybit, str) == false)
	{
		return false;
	}

	return true;
}